I am dealing with a line layer which I am unable to import properly into GRASS. After some work solving dangles and invalid geometry issues I managed to import it, nevertheless when I try to use v.clean.break the software is giving this message:

"Intersection with points is not yet supported"

I have no idea how to deal with it.

Looking for help.

Link to file: line layer.

3 Answers 3


I think I found the problem: in the original shapefile there seems to be a line of 0 length. THat's what is causing the "Intersection of points..." error. All you need to do is run v.clean with both the rmline and the break tools:

GRASS 7.4.0 (UTM17S):~/> v.import a_linefeaturefile.shp output=a_line --o
GRASS 7.4.0 (UTM17S):~/ > v.clean a_line out=a_line_clean tool=rmline,break --o

I got the error when using operator=or and solved it by decreasing the snap value from 0.2 to 0.0001.

  • Got this error with v.overlay 'or' & 'not'. Decreasing snap worked in both cases.
    – vinh
    Commented Sep 12, 2019 at 13:45

I got this error with r.contour. Fixed it by setting "minimum number of points for a contour" to 1 (default was 0).

  • this should be the default for this function
    – Kapanther
    Commented Jun 14, 2022 at 15:04

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